题目内容
17．-Do you think grandpa and grandma_________late？-No，the train is usually on time．（ ）
| A． | were | B． | will be | C． | was | D． | have been |
分析 --你认为爷爷和奶奶会迟到吗？
--不，火车通常是准时的．
解答 通过-No，the train is usually on time．这句话可以看出爷爷和奶奶去火车站坐火车不会晚因为火车不准时，进而说明还没有晚点，所以不能用过去式和现在完成时，只能用将来时．故此应选B
点评 这个题目有一定的难度，因为它没有明确的时间标志，只能通过上下文加以判断，这类题目必须仔细阅读和分析来确定时态．然后再根据不同的时态的结构作答．
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